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Analysis of Light Intensity and Charge Holding Time Dependence of Pinned Photodiode Full Well Capacity

In this paper, the light intensity and charge holding time dependence of pinned photodiode (PD) full well capacity (FWC) are studied for our pixel structure with a buried overflow path under the transfer gate. The formulae for PDFWC derived from a simple analytical model show that the relation betwe...

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Detalles Bibliográficos
Autores principales: Miyauchi, Ken, Isozaki, Toshiyuki, Ikeno, Rimon, Nakamura, Junichi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10649668/
https://www.ncbi.nlm.nih.gov/pubmed/37960547
http://dx.doi.org/10.3390/s23218847
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author Miyauchi, Ken
Isozaki, Toshiyuki
Ikeno, Rimon
Nakamura, Junichi
author_facet Miyauchi, Ken
Isozaki, Toshiyuki
Ikeno, Rimon
Nakamura, Junichi
author_sort Miyauchi, Ken
collection PubMed
description In this paper, the light intensity and charge holding time dependence of pinned photodiode (PD) full well capacity (FWC) are studied for our pixel structure with a buried overflow path under the transfer gate. The formulae for PDFWC derived from a simple analytical model show that the relation between light intensity and PDFWC is logarithmic because PDFWC is determined by the balance between the photo-generated current and overflow current under the bright condition. Furthermore, with using pulsed light before a charge holding operation in PD, the accumulated charges in PD decrease with the holding time due to the overflow current, and finally, it reaches equilibrium PDFWC. The analytical model has been successfully validated by the technology computer-aided design (TCAD) device simulation and actual device measurement.
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spelling pubmed-106496682023-10-31 Analysis of Light Intensity and Charge Holding Time Dependence of Pinned Photodiode Full Well Capacity Miyauchi, Ken Isozaki, Toshiyuki Ikeno, Rimon Nakamura, Junichi Sensors (Basel) Article In this paper, the light intensity and charge holding time dependence of pinned photodiode (PD) full well capacity (FWC) are studied for our pixel structure with a buried overflow path under the transfer gate. The formulae for PDFWC derived from a simple analytical model show that the relation between light intensity and PDFWC is logarithmic because PDFWC is determined by the balance between the photo-generated current and overflow current under the bright condition. Furthermore, with using pulsed light before a charge holding operation in PD, the accumulated charges in PD decrease with the holding time due to the overflow current, and finally, it reaches equilibrium PDFWC. The analytical model has been successfully validated by the technology computer-aided design (TCAD) device simulation and actual device measurement. MDPI 2023-10-31 /pmc/articles/PMC10649668/ /pubmed/37960547 http://dx.doi.org/10.3390/s23218847 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Miyauchi, Ken
Isozaki, Toshiyuki
Ikeno, Rimon
Nakamura, Junichi
Analysis of Light Intensity and Charge Holding Time Dependence of Pinned Photodiode Full Well Capacity
title Analysis of Light Intensity and Charge Holding Time Dependence of Pinned Photodiode Full Well Capacity
title_full Analysis of Light Intensity and Charge Holding Time Dependence of Pinned Photodiode Full Well Capacity
title_fullStr Analysis of Light Intensity and Charge Holding Time Dependence of Pinned Photodiode Full Well Capacity
title_full_unstemmed Analysis of Light Intensity and Charge Holding Time Dependence of Pinned Photodiode Full Well Capacity
title_short Analysis of Light Intensity and Charge Holding Time Dependence of Pinned Photodiode Full Well Capacity
title_sort analysis of light intensity and charge holding time dependence of pinned photodiode full well capacity
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10649668/
https://www.ncbi.nlm.nih.gov/pubmed/37960547
http://dx.doi.org/10.3390/s23218847
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